Can't create wireless network on Dimension E520.

Hello

I have a Dell Dimension E520 that has always been online by being plugged in via ethernet cable, however now I need it to run wireless. I have a Linksys Wireless SpeedBooster G USB card that I have plugged in. However, when it comes to adding a new internet connection in Windows XP, I am unable to add a wireless one. The only connection I have in network connections is the local area one. I have gone through the wireless network wizard which is completely useless and doesn't even create a network. I am using Qwest highspeed internet and the wireless network is protected by a WEP. Basically I just want to be able to create a wireless network and then i'm assuming it will find the networks around and I can join, but I am unable to create just a basic wireless network in network connections. I've gone through the wizard multiple times but all it does is bring me to a window that eventually says "finish" and once you click finish no network is ever created even though I have typed in all the information for it.

Thanks for any input you guys can share, i'd like to get this up and running.

Thanks